They are to play clips of new and returning TV series and an advertisement for PepsiCo Inc, which is helping fund the promotion.

CBS refused to say how much the campaign would cost, but a magazine industry executive familiar with the devices gave an estimate to the Financial Times that would indicate a cost of several dollars per videoscreen, which must be manually inserted into the magazine.

CBS has yet to decide how many videoscreens would go out as part of the promotion, saying only 'thousands'.